Analysis
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max time kernel
91s -
max time network
113s -
platform
windows10-2004_x64 -
resource
win10v2004-20241007-en -
resource tags
arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system -
submitted
31-12-2024 13:55
Static task
static1
Behavioral task
behavioral1
Sample
afd2a399f4c0a51300c3bbd1423b8cd8331d83422ed17ec6e74fd56fdba3f737.dll
Resource
win7-20240903-en
General
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Target
afd2a399f4c0a51300c3bbd1423b8cd8331d83422ed17ec6e74fd56fdba3f737.dll
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Size
1.8MB
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MD5
b8556c014807ea84d758a54d605388cc
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SHA1
5f1dd27467e813b1719b0e190de86892cbb9aa98
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SHA256
afd2a399f4c0a51300c3bbd1423b8cd8331d83422ed17ec6e74fd56fdba3f737
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SHA512
6f58cce75663a327233977facf53be047fab235cc6bcd9f34697e683826d69602c0fc6ce57c8fe11d9a674ac5d94d6d6bd6a50ee9f341a79f7c5d7322c10a680
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SSDEEP
24576:S7IY7a9IRCRqRPkHQo411810cNScGKJydXTZDwmzRMo3DP7x5nbiQjCm:aIY5RMHMf810Knor5zqo3zNJuQjCm
Malware Config
Signatures
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Ramnit family
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Executes dropped EXE 1 IoCs
pid Process 388 rundll32mgr.exe -
Drops file in System32 directory 1 IoCs
description ioc Process File created C:\Windows\SysWOW64\rundll32mgr.exe rundll32.exe -
resource yara_rule behavioral2/memory/388-15-0x0000000000400000-0x000000000041A000-memory.dmp upx behavioral2/memory/388-14-0x0000000000400000-0x000000000041A000-memory.dmp upx behavioral2/memory/388-13-0x0000000000400000-0x000000000041A000-memory.dmp upx behavioral2/memory/388-12-0x0000000000400000-0x000000000041A000-memory.dmp upx behavioral2/memory/388-8-0x0000000000400000-0x000000000041A000-memory.dmp upx behavioral2/memory/388-7-0x0000000000400000-0x000000000041A000-memory.dmp upx behavioral2/memory/388-6-0x0000000000400000-0x000000000041A000-memory.dmp upx behavioral2/memory/388-10-0x0000000000400000-0x000000000041A000-memory.dmp upx -
Program crash 1 IoCs
pid pid_target Process procid_target 1808 1560 WerFault.exe 85 -
System Location Discovery: System Language Discovery 1 TTPs 3 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
description ioc Process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language rundll32.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language rundll32mgr.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language IEXPLORE.EXE -
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\SOFTWARE\Microsoft\Internet Explorer\Main\WindowsSearch\Version = "WS not running" iexplore.exe Set value (str) \REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\SOFTWARE\Microsoft\Internet Explorer\Main\FullScreen = "no" iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\SOFTWARE\Microsoft\Internet Explorer\Recovery\PendingRecovery\AdminActive = "0" iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastUpdateLowDateTime = "3067919491" iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastTTLLowDateTime = "1251635200" iexplore.exe Key created \REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\Software\Microsoft\Internet Explorer\Main iexplore.exe Key created \REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\Software\Microsoft\Internet Explorer\Main IEXPLORE.EXE Key created \REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion\FileNames\ iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion\NextUpdateDate = "442418299" iexplore.exe Set value (data) \REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\SOFTWARE\Microsoft\Internet Explorer\Main\Window_Placement = 2c0000000200000003000000ffffffffffffffffffffffffffffffff2400000024000000aa04000089020000 iexplore.exe Key created \REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\Software\Microsoft\Internet Explorer\DomainSuggestion\FileNames\ iexplore.exe Key created \REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastCheckForUpdateHighDateTime = "31153035" iexplore.exe Key created \REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\Software\Microsoft\Internet Explorer\VersionManager IEXPLORE.EXE Set value (int) \REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\SOFTWARE\Microsoft\Internet Explorer\Main\CompatibilityFlags = "0" iexplore.exe Key created \REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\Software\Microsoft\Internet Explorer\VersionManager iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastUpdateHighDateTime = "31153035" iexplore.exe Key created \REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\Software\Microsoft\Internet Explorer\DomainSuggestion iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastCheckForUpdateLowDateTime = "3068075358" iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastCheckForUpdateHighDateTime = "31153035" IEXPLORE.EXE Set value (str) \REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion\FileNames\en-US = "en-US.1" iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\SOFTWARE\Microsoft\Internet Explorer\Recovery\AdminActive\{E22E0BA6-C77E-11EF-B319-D2BD7E71DA05} = "0" iexplore.exe Key created \REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch iexplore.exe Key created \REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\Software\Microsoft\Internet Explorer\GPU IEXPLORE.EXE Key created \REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion\FileNames iexplore.exe Key created \REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\Software\Microsoft\Internet Explorer\Recovery\AdminActive iexplore.exe Key created \REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\Software\Microsoft\Internet Explorer\Recovery\PendingRecovery iexplore.exe Set value (str) \REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\SOFTWARE\Microsoft\Internet Explorer\GPU\AdapterInfo = "vendorId=\"0x10de\",deviceID=\"0x8c\",subSysID=\"0x0\",revision=\"0x0\",version=\"10.0.19041.546\"hypervisor=\"No Hypervisor (No SLAT)\"" IEXPLORE.EXE Set value (int) \REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastTTLHighDateTime = "50" iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastCheckForUpdateLowDateTime = "3072138696" IEXPLORE.EXE -
Suspicious behavior: EnumeratesProcesses 8 IoCs
pid Process 388 rundll32mgr.exe 388 rundll32mgr.exe 388 rundll32mgr.exe 388 rundll32mgr.exe 388 rundll32mgr.exe 388 rundll32mgr.exe 388 rundll32mgr.exe 388 rundll32mgr.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 388 rundll32mgr.exe -
Suspicious use of FindShellTrayWindow 1 IoCs
pid Process 1664 iexplore.exe -
Suspicious use of SetWindowsHookEx 6 IoCs
pid Process 1664 iexplore.exe 1664 iexplore.exe 4688 IEXPLORE.EXE 4688 IEXPLORE.EXE 4688 IEXPLORE.EXE 4688 IEXPLORE.EXE -
Suspicious use of UnmapMainImage 1 IoCs
pid Process 388 rundll32mgr.exe -
Suspicious use of WriteProcessMemory 11 IoCs
description pid Process procid_target PID 2916 wrote to memory of 1560 2916 rundll32.exe 85 PID 2916 wrote to memory of 1560 2916 rundll32.exe 85 PID 2916 wrote to memory of 1560 2916 rundll32.exe 85 PID 1560 wrote to memory of 388 1560 rundll32.exe 86 PID 1560 wrote to memory of 388 1560 rundll32.exe 86 PID 1560 wrote to memory of 388 1560 rundll32.exe 86 PID 388 wrote to memory of 1664 388 rundll32mgr.exe 87 PID 388 wrote to memory of 1664 388 rundll32mgr.exe 87 PID 1664 wrote to memory of 4688 1664 iexplore.exe 90 PID 1664 wrote to memory of 4688 1664 iexplore.exe 90 PID 1664 wrote to memory of 4688 1664 iexplore.exe 90
Processes
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C:\Windows\system32\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\afd2a399f4c0a51300c3bbd1423b8cd8331d83422ed17ec6e74fd56fdba3f737.dll,#11⤵
- Suspicious use of WriteProcessMemory
PID:2916 -
C:\Windows\SysWOW64\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\afd2a399f4c0a51300c3bbd1423b8cd8331d83422ed17ec6e74fd56fdba3f737.dll,#12⤵
- Drops file in System32 directory
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1560 -
C:\Windows\SysWOW64\rundll32mgr.exeC:\Windows\SysWOW64\rundll32mgr.exe3⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:388 -
C:\Program Files\Internet Explorer\iexplore.exe"C:\Program Files\Internet Explorer\iexplore.exe"4⤵
- Modifies Internet Explorer settings
- Suspicious use of FindShellTrayWindow
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1664 -
C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE"C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:1664 CREDAT:17410 /prefetch:25⤵
- System Location Discovery: System Language Discovery
- Modifies Internet Explorer settings
- Suspicious use of SetWindowsHookEx
PID:4688
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 1560 -s 6403⤵
- Program crash
PID:1808
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 1560 -ip 15601⤵PID:1164
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\7423F88C7F265F0DEFC08EA88C3BDE45_AA1E8580D4EBC816148CE81268683776
Filesize471B
MD5febff5e5b64433316ee5f116c5c14309
SHA155a533777edeed0d18304f073d59d5ca1e5c7737
SHA256888dd735b3cf97e714243c7ecf44064128c4a97452b90ebbc66e317a113ef9a4
SHA512cbadeca5bbd2528b4af7ad6d053483adac27db83bfcd8b75312a5aa4b09302f729b67a04bbb9af840cb3abd78ec668b5a6c8746685ba0f15780b5e0ea3dd88d8
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\7423F88C7F265F0DEFC08EA88C3BDE45_AA1E8580D4EBC816148CE81268683776
Filesize404B
MD51d6422c945327fb6d07bd11fe2036b81
SHA14700a76e361f64c5a8c8e6347c2fe2dacd4caa74
SHA256e616a3c5f8090eba22f3f39089a75fcf47dae2361760431c5cc2483b9f94c629
SHA512cc851da4eea112d0f233497c60f22a264218b2f65f87b6d9791a33e58e24a8ce6fdf6fcca7e65eaae084e3cf5b9212e86c84509099225f38b7305df03956faff
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Filesize
17KB
MD55a34cb996293fde2cb7a4ac89587393a
SHA13c96c993500690d1a77873cd62bc639b3a10653f
SHA256c6a5377cbc07eece33790cfc70572e12c7a48ad8296be25c0cc805a1f384dbad
SHA512e1b7d0107733f81937415104e70f68b1be6fd0ca65dccf4ff72637943d44278d3a77f704aedff59d2dbc0d56a609b2590c8ec0dd6bc48ab30f1dad0c07a0a3ee
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Filesize
87KB
MD51e55a2d7a5b3b8f2970c134145d54ab4
SHA13113838605f4c4a84656a7dea5b1b0effb89d015
SHA25649a9fb163b538f1d32f5bd492b1089388b6ed9293ff7c6dd2756100e34f87c4c
SHA5129b47379aaf3e71d6a4ee3b0508768a42eb247dde4a0b8135e1af6119e26fcb47af9f45bfe3f4f0ac453e19317bf121d7b71d0d152987d6d40ae5a8781beec8aa